Who knows eighty-five?
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A Sefer Torah parchment that contains at least 85 letters, equaling the number of letters in Vayehi Binso'a (the smallest "sefer" in the Torah), is considered a "sefer" with regard to making one's hands tamei. (Mishnah Yadayim 3:5)
85 are the verses in Parshas Vayechi, which records Yaakov's blessings to his children and grandchildren. Appropriately enough, the mnemonic at the end of the parshah is פה אל פה - "[speaking] mouth to mouth" (in English terms, "face to face").
Doeg killed 85 Kohanim who were "linen apron" wearers (prominent Kohanim) among the other Kohanim of Nov. (Shmuel A 22:18)
Kalev was 85 years old at the time of the distribution of the land of Eretz Yisrael. (Yehoshua 10:14)
Sanhedrin 97b records Eliyahu HaNavi's statement that the pre-messianic world will span at least 85 Yovel cycles (4,250 years).
Megilas Rus has 85 Pesukim which is also the Gematria of Boaz.