Nope, I don't think Zidane scored a pen with his left foot in a world cup finals. He has certainly scored with his right foot.
i reckon it has to be different tournaments as I'm almost certain Mattheus was the pen taker for 1990 but didnt fancy the one in the final
Did a bit of "cheating" research on him, and he scored in the quarter final shootout against Mexico in 86 and the semi final shootout against England in 1990 and in the final in 1990 against Argentina