If your wall is 96 then 48 is half.
Tile half wall height.
Factoring in the grout lines this meets the minimum with a bit to spare.
I have seen it done as a fully tiled wall but ours will be only half way up.
The minimum should be 6 feet from the base.
A classic offset or straight set pattern in a standard field size tile works best for this wall height.
For a truly classic look finish the top with a decorative trim or a bullnosed edge.
I believe your title or question answers it s self.
I prefer at least 6 and a half to 7 feet.
A practical height when working with full sized 12 tiles is 6 courses.
Half the wall is half the wall.
Standard tub and shower walls the minimum code height for a tub or shower enclosure s waterproof covering is 6 above the finished floor.
Much depends on your taste how tall the shower head is and whether you want extra protection from mold or potential splashes on the paint that could eventually cause problems.
Calculate your ideal height for the half wall which typically ranges between 30 to 40 inches.
Variables to consider include the size of your planned field tiles including grout width as well as.
Tile half wall height how to finish the top other than bullnose.
How high to tile when tiling half the wall.