How can I raise up my thermostat?

It isn't hard, you can do this. Here are a few links.

https://www.comfort-pro.com/2016/07/how-to-move-a-thermostat/

https://www.hunker.com/13414335/how-to-move-a-thermostat

https://youtu.be/5_DNeLPZh5w

Yes, this can be done, with standard home wiring knowledge and providing there is enough wire to stretch the thermostat control box this far

-turn off the power breaker to the thermostat

-take off the cover and gently pull out the wiring out of the hole in the wall

-if there is enough wire (shine a flashlight inside the hole to see if you can tell from what direction the wiring is coming from- maybe it is wound around a 2x4 etc.)

-if there is enough wire, then make a small hole in the new location on the wall where you want your controller

-"fish" the wire up to the new hole using a long object, such a bamboo skewer with the end of the wire taped

-small fingers, two pairs of hands, long needle-nose pliers, and wearing a head light facilitate doing this.

-reattach the controller box as necessary

This method can also be used to relocate a thermostat controller from one side of the wall to the next.

Hi, Here's a link that may help: https://www.comfort-pro.com/2016/07/how-to-move-a-thermostat/

Good luck!

Call an electrician, we had to move our dining room fan/light, to a new position about 3 ft. Have an electrician do it.

You're welcome.'Wishing you much happiness in your new house.