I got 225 in NMAT. 77/79/67. Should I give a reattempt? What could be a safe score or nummber to touch?

Last year, NMIMS Mumbai had a cut-off of 74 in Quants. So, if that 67 is in Quants, and you want Mumbai, you can think about a retake, on the other hand, if 67 score is in LRDI or VA, it should be good enough.
Overall cut--off can go as low as 200-205 and as high as 235-240, differing from person to person, so 225 should most likely be safe, but if you want to be sure, try to touch 240.