It's better to error on the side of too little pitch than too much pitch with two stroke motors. Two strokes don't like to be loaded down, and will do much better running at motors max rated rpm or even a tick over. If looking at a prop that will put you 300 rpm below max versus one that will put you 100 rpm above max, go with the 100 above. There are very few two strokes motors that it would be a problem turning them more than their max rating. A couple you don't won't turn over are the old cross flow OMC,s, they developed harmonics that can break the crankshaft, The early Fichts, the injectors in those a too small and even their recommend max can make them lean and melt a piston, a couple of the Japanese have two piece crankshafts and that can sometime cause a problem, but for the lions share, a 100 or so over is not going to bother a thing. Too much pitch will actually slow you down kill a lot of hole shot, and one slightly too small will not slow you down and give you much better hole shot.
One suggestion before getting to far into prop swapping, get the motor checked out, make sure it's performing at peak performance or you may end up spending a whole bunch of money on the wrong size prop.
Also, you said the motor was too low and you raised it. Sounds to me like you raised it too much. You should start tuning with the motor about 4" below the pad to make and then work up from there in 1/2" increments watch the tach, water pressure gauge and gps. When you see and increase in rpm but not speed you are too high, go back down 1/4". If you feel a loss of bow lift, which sometimes goes along with a loss of speed, again, too high, go back down 1/4". If you are having to run a lot of outward trim and kicking a tall rooster tail, you are too high, and possible to little setback. With the right amount of set back and the right engine height, you motor should be at a neutral trim so all power is be applied in a forward direction, and not having to waste power lifting the bow of the boat with extra outward trim. If everything else looks and feels good make sure you are not dropping water pressure in turns below recommended minimum, if so, you need to go back down