I am putting more mirrors and moving lights and electrical outlets for my wife/daughter's bathroom. The current wall mounted vanity lights need to go up higher. My understanding is it is not proper to put a junction box enclosed inside a wall. Is there an easier way to move this light without having to re wire from the switch to the light? The other thing is I think this light is in series with another circuit somewhere in another bathroom so whatever I do will affect other lights.

I appreciate it!