<p>I think the 74k is including transportation, and other living expenses such as clothing and health insurance. The 66/67k are only including room and board, fees, books, and tuition. I think I read somewhere that you need to prove the 74k for the I-20, though I am not sure and you definitely should call the financial department at NYU and ask them.
Good luck and I hope you can attend NYU!</p>