The money, which does not include the $2.5 million generated by the Livestrong Gala in October, is up three percent from the same time period in 2011. The number of people donating is up 7.3 percent.
Garvey, a retired venture capitalist, credited Armstrong on Monday for changing the way the world views people affected by cancer.
Armstrong's spot on the 15-person board likely will be filled in the coming weeks.
“Because of Lance, there is today more focus on the individuals whom this disease strikes, and on healing the person, not just killing the disease,” Garvin said in a statement.
Armstrong took over as full-time chairman when he retired from cycling the first time in 2005. As chairman, he represented the foundation at events around the world and also was in daily contact with foundation chief executive Doug Ulman.
Armstrong returned to Austin late last week after spending nearly two weeks at his home in Hawaii.
He did not return a message Monday from the American-Statesman.
However, Armstrong has been active on his Twitter account.
On Saturday, he tweeted a photo to his 3.8 million followers showing him “layin' around.” The photo was of Armstrong reclining at a room in his Austin home, with his seven framed Tour jerseys adorning the walls.