Involved in the secretory pathway as part of the exocyst complex which tethers secretory vesicles to the sites of exocytosis. Plays a role in both the assembly of the exocyst and the polarization of this complex to specific sites of the plasma membrane for exocytosis. Also involved in assembly of the spliceosome (By similarity). Component of the exocyst complex. Cell periphery. The polarization of exo84 requires actin cables (By similarity). Belongs to the EXO84 family.