Question: What is the birth year of the designer and entrepenuer who secured the rights to distribute the video game that was released on June 6, 1984 and programmed by Alexey Pajitnov?
Sentence (from "Tetris"): He derived its name from the Greek numerical prefix "tetra-" (all of the game's pieces contain four segments) and tennis, Pajitnov's favorite sport.
Relevant evidence: No