@Abogos the cut-off score changes with every test. I had once believed that NCEES took a sample of "average" licensed engineers in the field, have them take the exam, then whatever they average is that specific exam's cutoff score. But after minimally fact-checking myself, I may be wrong. Either way, here is the quote from the NCEES website:
NCEES Exam Scoring Process -
https://ncees.org/exams/scores/
"When an exam is introduced or when its specifications change, a committee of subject-matter experts works with experienced psychometricians (testing experts with a background in statistics) to determine the level of performance that corresponds with minimal competence in that discipline. This becomes the passing score. NCEES does not publish passing scores because they change with each administration. NCEES scores each exam with no predetermined percentage of examinees that should pass or fail. All exams are scored the same way. First-time takers and repeat takers are graded to the same standard."