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 and to the budding site. Also involved in assembly of the spliceosome. Component of the exocyst complex composed of SEC3, SEC5, SEC6, SEC8, SEC10, SEC15, EXO70 and EXO84. Interacts also with SNP1. Cell periphery, bud and bud neck. The polarization of EXO84 requires actin cables. Belongs to the EXO84 family.