First, read
https://www.flyertalk.com/forum/amer...under-way.html. There are two “flavors” of 772 Business seats, the all-seats-face-forward Super Diamond seated aircraft and the “ying and yang” face-forward-and-aft Zodiac.
Once you look at your PNR to see the seat selection chart to determine which version of 777-223ER you’re flying, see
Best Seat 777-200 “772” 37J Super Diamond Business Class
or
Best Seat 777-200 “772” 37J & 45J Zodiac (Aft & Fwd) Business, as needed.
And keep checking until close to departure, because equipment changes can occur. They’ve certainly happened to me when I’ve flown on 772s.