The Flyers are the 8th seed as of now with 73 points and 17 games remaining. Columbus is in 7th with the same. If either wins 10 of those games they will have 93 points. Even 8-6-3 gives them 92 points. Detroit is tied with us at 71 with a game in hand. There is a very good chance at least 2 out of 3 of these teams are going to accumulate 19 or 20 more points. I would stop counting on 91 by now; it's an outside shot.
On a side note, not including last year's shortened season, 91 points hasn't gotten any team in since 2009-2010 (3 teams in the East) and not since 2008-2009 in the West (one team). Overall, since the full season lockout 10 years ago, 5 teams have made the playoffs with 91 points or less (3 East, 2 West).