Under Horizontal Direction, click in Direction Reference and select a sketch, edge, face, or move the cursor to set the horizontal orientation of the view. You can also type a value in Angle Created with Horizontal View and flip the direction by 180° by selecting Reverse Horizontal Direction.
I'm not in front of my PC but have you looked in the help that is offered in Solidwoks? I suggest just in case! But I think you've already had to look...