To find out how much Michael improved from the first game to the second game, you need to subtract his score in the first game from his score in the second game.
Michael's score in the first game: 4,134
Michael's score in the second game: 5,524
Improvement = Score in the second game - Score in the first game
Improvement = 5,524 - 4,134
Improvement = 1,390
Michael improved by 1,390 points.