Pennco vinyl sliding patio door

I'm not sure sure that the Pennco door can be reversed. Take a look at the related videos on vinyl patio doors. The ones shown in the videos are the type that could be reversed. However, in some cases, the stationary door is built into the main frame of the door. If that's the case for you, then you won't be able to do it. 

If you can, send us some photos of your patio door. Maybe if we see the main frame and doors we can get some idea if they can be reversed.