Controllerless Networks

I have 8 IAP105's in a cluster and I am trying to get wireless into a remote guard shack on premise.  The closest AP is 75 feet away and there is a brick wall in the way.  Can I "extend" that signal to another AP located in the guard shack (bridge mode?)

https://community.arubanetworks.com/t5/Controller-less-WLANs/Aruba-Instant-4-1-Mesh-Configuration/ta-p/214943

forgot to mention, we use POE to power all the IAP's up.  for the guard shack, there will not be a network run, we will power with a power brick.

I typically would not shoot RF through a brick wall. You'll find that your signal degrades significantly. This would happen with any solution

You can attempt the guide that Tim has provided but I am not sure your scenario will work basically because of distance.

The best solution would be to mount IAP-175 devices on the outside of both buildings and create a mesh with those while routing the 2.4 antenna inside the guard shack for it's side. This would provide you with the most reliable solution.

I was wrong in my previous post, the device in the guard shack that need network access only supports a hardwired connection.  Can I bridge off a nearby AP?

Yes, if it's an AP with multiple ports you could add a wired port profile to the second port.