NFCU WILL pull EQ, but your 680 score should be plenty as long as you don't have any recent baddies. I've been approved by them with a lot of inqs on EQ, so I don't believe them to be too inq sensitive.
I'd say you stand a good chance of approval.
Yes, NFCU pulls EQ exclusively. I'd say a 680 is quite good enough for them. 5 inquiries is nothing to worry about.