Max numbers are posted on their site, and that should always be your goal. not the "passing" level.
Remember you have one shot and you should do your best. The AF OCCASSIONALLY allows a 2nd shot, but they decide who gets to re-take, and it traditionally is a candidate that they "like".
There is no "true" pass level. CFA accounts for a specific % of he WCS. That score is how you win the appointment.