The quaint answer is 'everywhere'. In the hearts of those that are His. But biblically, there is a specific place (or dimension?) in which God dwells for example to His People, much like the Holy of Holies in the Tabernacle in the wirlderness, where the Shekinah glory is manifested. (We are told that the tabernacle is an earthy representation of the true). Not that God actually dwells in a temple made with hands, but there is a conduit by which His power and glory is manifest that we may not be consumed by His Presence. Much like how a man might operate an electron microscope to peer into the microscopic world and possibly manipulate molecules with delicate instruments controlled by computer through inputs on a larger scale. Do you understand this poor analogy?