They give stats like that so they can brag that their program prepares students well for Boards.
I can't speak for other dental schools, but at LLU, you are given the opportunity to take it again. Not sure how many times, but it is definitely not a one shot thing.
u can take it up to 3 times, if u fail the third time u get kicked out of school. like 97% of people pass, there's a huge curve, at least thats how it was when the boards were a # grade, not just p/f. but dnt stress it, u have a lot of classes to get thru before u even take boards!