I am from a Canadian school and trust me when I say they really like their well rounded students so its not all about marks.
I did a 5 year double major bachelor of science (Bio sci, Phys sci) and spent the last two years in Kinesiology to try and stay fresh.
GPA~3.3 total although about a 3.6 last two years,
DAT in 2010 was: 21 Chem, 22 Bio, 22 Reading, 26 PAT and 14 Carving (bad quality soap and it fell apart on everybody I wrote with)
Re did DAT in fall 2013 got: 20 Chem, 21 Bio, 24 Reading, 22 PAT, and 29 Carving (much better this time around)
NYU likes extensive shadowing (over 100 hours required) and I had extensive volunteer work on top of everything.
When it comes down to it I believe its really about great references and really selling yourself in in the personal statement. Be yourself and honest and yet really let them know that you have what it takes and then some to be a dentist.