The Knicks have outscored teams by a total of 85 points in OG Anunoby’s 137 minutes on the floor since arriving in New York. The mind-boggling plus-minus stat shows just how impactful Anunoby’s presence has been for a Knicks team that desperately needed his size, shooting and defensive IQ on the wing, especially after starting center Mitchell Robinson went down with what is believed to be a season-ending ankle injury. Anunoby’s unassuming stat line of 12 points, five rebounds and 1.5 steals per game doesn’t effectively describe the effect he’s had on his team. He’s shooting a modest 37.5 perce…