Is "29% total physical memory reserved by individual processes" good or bad?

I'm running Windows 10 with 16 gb ram. When I run Task Manager, it tells me "29% total physical memory reserved by individual processes":

http://imgur.com/a/lURY9

I have 3 chrome windows open with about 15 tabs. Also have a Skype and MS Word open.

Computer sometimes feels a little slow. But mostly ok. My question is: is 29% really high? Would I benefit from much higher RAM?