Is my SAT2 score good, and which other ones should I take?

I just got a 750 on the chemistry SAT2, but I don't really know what to make of that score. What percentile does that put me in, and will that score help me to get into a top notch school? Also, which other SAT2's should I take? I want to take biology and math 2, but I've heard that it's best to show that you are well-rounded by taking tests all in different subjects. However, I am also very interested in entering a pre-med or accelerated medical program, so it seems as though I should be taking tests that relate directly to that. What do I do?