I created list workflow using SharePoint Designer. How to deploy my list workflow in Production environment?
You can try workflow import/export feature to deploy your workflow to your production environment.
Check the following link to import/export your designer workflow:
Use a migration tool like: DocAve, Metalogix, Quest, etc.
If you can't use a tool, then you have to do a manually:
Second is: Using Save List As template option create List template then after upload this List template to Production Environment.