The recommended height for wall-mounted TV depends on individual preferences and seating arrangements in the viewing area.
In general, the TV should be mounted with the horizontal and vertical center lines at eye-level of the viewers.
In addition, each TV model has a different viewing angle specification, which is the number of degrees you can view the TV screen from off-center, and still see a clear picture.
Refer to the Marketing Specifications for the specific viewing angle of your TV model. Manuals are posted on your model support page.