The bottom of the fixture should be 30-36" above the table surface, with an extra 3" of height for every foot of ceiling over 8', so this would put your fixture at about 48"- 54" above the table top. Give it the ol' eyeball test, too, though, to adjust for things not mentioned in your note, such as the total size of the fixture itself.

can you tell me where you purchased this pendant light? thank you.