how do i adjust front seat belt shoulder anchorage
adjusting front seatbelt on 1997 Lexus LS400
Its one of those things that is intuitive to people that work on cars. I would just stop into any repair shop (preferably with Lexus or Toyota experience) they will surely take a moment to show you how to raise or lower the belt, The upper belt shoulder anchor should just slid up or down the door pillar.
The adjustment button is part of the driver settings button cluster near the driver's door latch where two driver's mirror, seat, and steering wheel setting preferences are stored\recalled.