Well, it depends on the school you're applying for.
If you're shooting for the top schools (excluding Yale, Harvard, Stanford, Chi, Mich...), then upper 160's should be OK. Lower tier 1, you should aim for the mid 160's, tier 2 -- around 160. Remember, it is all in numbers (UNFORTUNATELY). They can say it is not, and that they're looking at all documents in your file...not true.
Happy Holidays,
an MSEE