Yes, you should mount the shower curtain rod higher than the showerhead. This helps to prevent overspray and the splashing of water from over the shower curtain. However, you don’t want to mount it too high. Your shower curtain needs to be long enough to hang at least six inches past the top of your tub. You also don’t want the shower curtain to be so long that it sits on the floor. Too short and it could billow into the tub, defeating its purpose. Too long and it could potentially sit in a puddle, encouraging mildew growth.