FLBuff, I disagree with 56/80 as the starting point. I have discussed this many time here, here it is again. 70 is a score and not % of questions to be answered correctly. Visit the following link from the NCEES website.
http://www.ncees.org/exams/scoring/scoring....php#difficulty
For further clarification visit here,
http://www.tpcb.org/ExaminationScoring.pdf
Basically, for each test the # of questions to be answered correctly differs and no one knows what it is. Unless it is published anywhere, we will never know. In fact, we don't even know if all 80 questions are even considered for scoring!! Some questions are thrown out of consideration due to insufficient data or ambiguity, etc. It is theoretically possible that on an "easy" test you can score 56 and still not pass.
I would encourage you to do your best and not worry about # of questions you get right. Don't give up and take this test head on.