This unnamed old man was "cured" of emphysema by Roy Le Grange.
At some point, this man was bound to a wheelchair and required an oxygen mask to breathe. He sought out reverent Roy Le Grange hoping to be cured. Roy eventually selected him as a chosen one and performed the ceremony to heal the man.
Unbeknownst to everyone present, including the old man and Roy, a reaper was curing the man of his terminal illness in exchange for the life of a young jogger. The reaper took the woman's life, while Roy seemingly restored this old man to full health, relinquishing him of the need to use his wheelchair and oxygen mask, much to the joy of the crowd.