The wall mount is suitable for screen sizes from 32 to 90 inches and supports a maximum weight of 60 kg. Since your Samsung TV 75'' QLED 4K is within these size and weight limits, the wall mount should fit, provided that the VESA mounting distances of the TV are compatible (between 200x200 and 600x400 mm). Check the VESA mounting distances of your Samsung TV to make sure they are within these ranges.