84 (number)

84 was a number.

According to Jo Grant, three sevens times four were equal to 84. Also, when questioned by the Third Doctor how much was 84 minus 35, she answered 49. (TV: The Claws of Axos)

Eighty-four Panjistri were selected for the mission to prevent the end of the universe. (PROSE: Timewyrm: Apocalypse)