You said your class has 20 people, right? 16 points higher could be huge!! Not to mention, that does not mean that he is the only high pass! I think you need to wait until you sit down with this professor before you get all out of whack here.... It is more than possible that the other 16 people in your class had grades above yours. If they did and the professor wanted to grade it on a curve, so be it. That is what law school is all about.