Here's my experience - I was in 84A on the LHR-HKG day flight - hated it! So seeing how the upper deck was not full I moved myself to 92A. I knew in advance that seatguru had it in yellow but after riding the upper deck on the queen of the skies - I'd chose the very back row. I thought 88 A/K stuck out for privacy sake and not to mention I thought every other seat had poor privacy now with the new J (I'm not a fan).

My preference now would be 92K followed by 92A and BTW there was no galley or lavatory noise - noise cancelling headsets work wonders. Enjoy CX