Welcome to FT
Yes, they fully recline in as much as they do for any other seat. It's weird combo recline with the seat sliding forward somewhat, at the same time as the back tilts.
Sadly, the 79H occupant is unlikely to get much rest as PAX frequently come down (towards the back of the craft in the dark) through the curtain located just in front therre and blunder in to 79H (& 79C for that matter).
I suggest wearing white socks and other light colored clothing to improve the chances of being seen in the dimly lit cabin.