...to 78%. Numbers per SportsClubStats (link below). Essentially, what the site does is, they randomly generate results for the rest of the season, running millions of complete season simulations starting from the standings today, and then calculate the likelihood of different finishes in final standings for each team. They also report the effect that each conference game has on other teams. Tonight, Detroit and Vancouver both lost, which was the best possible outcome (statistically) for the Kings.
As of tonight, the point threshold for making the playoffs (in 95% of the simulations) is 96 points. At 92 points, it's 50/50.