I'm thinking perhaps 85 of the 95 available. I've looked into it a bit, and I'm not sure he will get over the 50% mark in congressional districts 10, 13, 15, 20, 21, 22, 23, 24, and perhaps 12 and 25 (some of these are NYC districts with few Republicans, others are from parts of upstate). So long as he still wins the plurality in these congressional districts, he will only lose one delegate per district.
This really is the Trump vs. anti-Trump election because no one in their right mind would vote for Cruz or Kasich to actually be President.
Thank you for your input !
He only needs 80 or more to stay on track. I predict if he gets less than 90 the media will be treating it as a loss for Trump and a WIN for GOPe.