The victory puts the 27-year-old just three wins away from the all-time record held by Ingemar Stenmark of Sweden, who captured 86 World Cup wins between 1974 and 1989.
Eclipsing Vonn is the latest history-making achievement by the twice Olympic gold medallist and four-time overall World Cup champion, who could potentially end her career with more than 100 victories on the ski racing circuit.
She ended that season as the Olympic, World Cup and world champion in slalom and her profile grew considerably as media appearances and sponsorships began to pile up for the amiable 18-year-old star.
A powerful and precise skier, Shiffrin is the only athlete to win World Cups in all six disciplines - downhill, super-G, alpine combined, giant slalom, slalom, and parallel.
Her mettle intact, she went on to win her fourth overall World Cup title later that year.