Garza spotted up from well beyond the three-point line above the key and nailed the three-point shot to send it to overtime.
After that point, Baker was in control and outscored Tabor, 13-7, in the extra period. Garza finished with 21 points and four assists and Shea Shoemaker led the team with 25 points on 8-of-15 shooting.
Baker forced 19 turnovers but committed 24 of their own. The Wildcats hit seven 11 three's on the night and shot a stifling 58.8-percent from the field in the second half and overtime combined.
With the win, Baker improves to 1-0 to open the year and will take on Southwestern on Saturday at 3 p.m. inside Collins Center in day two of the Baker Classic. Southwestern defeated Mid-America Christian, 72-69, to open up the tournament.
Baker and Tabor were all knotted up at 36-36 at the half. Baker led by as many as eight points in the first half and Tabor had a lead of seven points with 15:08 to go in the first.
Leading the way in the first half was Shoemaker with her 10 points and two three-point field goals.
The Wildcats did commit 12 first half turnovers but held Tabor to just 34.5-percent from the field.
Baker nailed six three-point field goals in the first half and made 11 field goals on seven assists.
Macy Wallisch had a big night defensively five blocks and six rebounds and Garza had a block of her own.