After reviewing the remaining schedule for United & Chelsea (I feel Liverpool and Arsenal are just too far back in the table to compete), this is how I predict the rest of the season to shake out. United would fall short of the 90 points barrier, which I think is plausible. Even if United lost one more game than Chelsea the rest of the way, the gap I believe is too big (goal differential is worth at least a draw the remainder of the season).
Losses: 2 (Liverpool (Away) & Chelsea (Away))
Total Points (at Season End): 87
Losses: 2 (West Ham (Away) & Arsenal (Away))
Total Points: 83
I believe Sir Alex said once that five losses should win you the league in most years and that would be where United would end this campaign.