When actor is made to go left or right and the position of the mouse click is slightly above or below actor's hot spot, he goes to the new point in a straight line. This looks unrealistic, since the actor's legs walk strickly right or left (as animated), but the actor also "floats" upwards/downwards.
My suggestion is to make the actor follow a so-called "L" shaped line in this case, so that if the position of Mouse click was slightly above/below the hotspot, actor firstly goes upwards/downwards (or in diagonal) until he's at the same horizontal level with the mouseclick point, and then goes right/left.
I've seen this approach in a game, made with "Point&Click Development Kit" Engine. This game, as an example, can be downloaded here:
http://www.how2make.ru/h2mgame.rar (8mb)
This approach, in my opinion, produces much more realistic results.