I can tell you for sure that #35 is from the 80's as it is a picture of Michelle Obama and she graduated HS in 1981 and this is her prom picture. The late 70's and early 80's had very similar hair and clothing styles, so it is possible that #34 is from 80 or 81 as well.
#34 and 35 seem to date more from the 70's.my graduation pic was taken in that same chair lol. And my hair was like
#34 in 76.