CREATE TABLE table_11734041_11 (height_in_ft VARCHAR, years_for_rockets VARCHAR)

What is the height for the player in 1968-72?
SELECT height_in_ft FROM table_11734041_11 WHERE years_for_rockets = "1968-72"
SELECT "height_in_ft" FROM "table_11734041_11" WHERE "1968-72" = "years_for_rockets"