Name the highest Parallel Bars of the united states with a Vault smaller than 63.85?
CREATE TABLE "top_8_teams_qualified_for_team_finals" (
  "position" text,
  "country" text,
  "floor" real,
  "pommel_horse" real,
  "rings" real,
  "vault" real,
  "parallel_bars" real,
  "horizontal_bar" real,
  "team_total" real
);
SELECT MAX("parallel_bars") FROM "top_8_teams_qualified_for_team_finals" WHERE "country"='united states' AND "vault"<63.85;