A man pushes a chair across the floor by applying a force of 155N at an angle of 25-degrees South of East. The chair accelerates to the right along the floor at 1.20 m/s/s.

I know I asked this question yesterday but I'm still really lost and don't know how to find the Normal Force acting on the chair. Is the normal force greater or less than the weight of the chair? The answer is 261.5N I just don't know how to solve this problem.