The TCL 75QM851G features a VESA mount pattern of 500 x 400 mm. For precise installation, it's important to know the distance from the bottom of the VESA mount holes to the bottom of the TV. Unfortunately, the search did not provide exact measurements for this specific dimension.

For similar models, such as the TCL 75R635, the distance from the bottom of the TV to the bottom mounting hole is approximately 9.39 inches, which may offer a useful reference, though exact distances can vary between models.

To ensure you get accurate information, I recommend checking the official TCL support documentation or contacting TCL customer support directly for the most reliable measurement regarding the 75QM851G model. Here are some resources that may assist you in finding the needed information:

1. TCL Support - How to Choose the Correct Wall Mount
2. DisplaySpecifications - TCL 75QM851G Specifications

If you can access the TV physically, measuring this distance directly would yield the most accurate result.

Sources

How to Choose the Correct Wall Mount - TCL Support74.5" TCL 75QM851G - Specifications - DisplaySpecifications74.5" TCL 75QM850G - Specifications - DisplaySpecificationsWhat is the distance of the VESA mount from top/bottom on TCL ...Ask TCL: Mounting your TCL TVTCL 75R635 Hole Measurements from Top and Bottom of TVTCL 75" Q Class 4K UHD HDR QD-Mini LED Smart TV with Google TV

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